改性纳米钐/铋/乙烯基酯辐射屏蔽复合材料的制备及性能验证  

Preparation and Performance Verification of Modified Nano Samarium/Bismuth/Vinyl Ester Radiation Shielding Composites

作　　者：任翼 赵娇 戴学志 晏敏皓 REN Yi;ZHAO Jiao;DAI Xue-zhi;YAN Min-hao(State Key Laboratory of Environment-Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China;School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,China;Suzhou Zihan Science and Technology Co.,Ltd.,Suzhou 215011,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,绵阳621010 [2]西南科技大学材料与化学学院,绵阳621010 [3]苏州子涵科技有限公司,苏州215011

出　　处：《科学技术与工程》2023年第27期11747-11752,共6页Science Technology and Engineering

基　　金：国家自然科学基金联合基金(U1932117);四川省自然科学基金(2022JDTD0017,2022NSFSC1228);西南科技大学博士基金(21zx7102)。

摘　　要：面对现代辐射防护提出的轻量化和无铅化要求,聚合物基屏蔽材料愈发受到重视。将改性后的纳米氧化钐(nanoSm_(2)O_(3))和纳米氧化铋(nanoBi_(2)O_(3))作为屏蔽填料,通过原位聚合法制备了改性纳米钐/铋/乙烯基酯辐射屏蔽复合材料(M-nanoSm_(2)O_(3)/M-nanoBi_(2)O_(3)/vinyl ester,SBV)。采用红外光谱和X射线衍射对改性前后的纳米填料进行了表征,通过热重分析、力学性能测试、断面扫描及伽马射线和热中子屏蔽性能测试研究了填料含量对复合材料性能的影响。结果表明,添加改性纳米填料能够显著增强复合材料的热稳定性能和屏蔽性能,但过量添加会严重破坏复合材料的力学性能。综合考虑,掺杂量为30%(质量分数)时,复合材料综合性能最佳,兼并无铅、低比重和高屏蔽性能的特点,可应用于混合辐射场中的屏蔽材料。In the face of the requirements of lightweight and lead-free in modern radiation protection,polymer-based shielding materials have been paid more and more attention.Here,the modified nano samarium oxide and nano bismuth oxide were used as shielding fillers to prepare the modified nano samarium/bismuth/vinyl ester radiation shielding composites(SBV)by in-situ polymerization.FT-IR and XRD were used to characterize the nano fillers before and after modification.The influence of the content of fillers on the properties of the composite was studied through TG analysis,mechanical property testing,cross section scanning,and gamma ray and thermal neutron shielding performance testing.The results show that the thermal stability and shielding properties of the composite can be significantly enhanced by adding modified nano fillers.However,excessive addition will seriously damage the mechanical properties of the composite.In general,the composite has the best comprehensive performance when the doping amount is 30%.It combines the characteristics of lead-free,low specific gravity and high shielding performance,and is expected to become a shielding material used in mixed radiation fields.

关 键 词：氧化钐 氧化铋 环氧乙烯基酯树脂 辐射防护 复合材料 

分 类 号：TQ050[化学工程]